An urban microclimate model integrated with the mesoscale, local scale, microscale and building scale models is presented for the urban thermal environment and urban heat island (UHI) mitigation study. This integrated multi-scale and multi-physics urban microclimate model takes the impacts on the urban microclimate of multiple physical processes of regional climate, urban climate, building and pavement material properties, and anthropogenic heat into account. This objective is achieved by coupling weather and energy models, the weather research forecasting (WRF), OpenFOAM and EnergyPlus. This study presents a method of distributing initial and boundary conditions from mesoscale into microscale through the integration of building thermal behaviour and microclimate. We further examine the integrated model by taking the Kent Ridge campus of National University of Singapore (NUS) as a test case. The preliminary application focuses on the assessment of weather conditions at the local scale and the feasibility of using mesoscale WRF outputs as inputs for the CFD model.

提出了结合中尺度，局部尺度，微观尺度和建筑尺度模型的城市小气候模型，用于城市热环境和城市热岛（UHI）的缓解研究。这种集成的多尺度和多物理场的城市小气候模型考虑了区域气候，城市气候，建筑和路面材料特性以及人为热量等多种物理过程对城市小气候的影响。通过将天气和能源模型，天气研究预报（WRF），OpenFOAM和EnergyPlus耦合起来，可以实现此目标。这项研究提出了一种通过建筑热行为和微气候的整合将初始和边界条件从中尺度分布到微观尺度的方法。我们以新加坡国立大学（NUS）的肯特里奇校区为测试案例，进一步研究了集成模型。初步应用着重于评估当地尺度的天气状况，以及使用中尺度WRF输出作为CFD模型输入的可行性。